package main

import (
    "fmt"
    "time"
    "runtime"
)

var quit chan int = make(chan int)

func loop(a int) {
    fmt.Println(a)
    for i := 0; i < 30000000000; i++ {
    }
    fmt.Println(a)
    quit <- 0
}

func main() {
    runtime.GOMAXPROCS(1)

    go loop(1)
    time.Sleep(time.Second)
    go loop(2)

    for i := 0; i < 2; i++ {
        <-quit
    }
}